Use Bitly to generate short URLs in WordPress. Visit blog post https://bit.ly/2XB3M8s

bitly_integration_with_wordpress_3.php

<?php

  add_action('manage_posts_columns', function($columns) {

    $columns['bitly_url'] = 'Bitly URL';
    return $columns;
  }, 10, 1);

  add_action('manage_posts_custom_column', function($column, $post_id) {

    if ('bitly_url' === $column) {
      echo get_post_meta($post_id, 'bitly_url', true);
    }
  }, 10, 2);